The RCS figures being used to plot the curves in the above graph are based on what?
Obviously based on X band emissions.
That's how the stated RCS of an aircraft is ascertained by comparing against the distance required to detect it and the standard detection distance for 5m^2 or 3m^2 or even 1m^2 target for that family of radars.
These standard figures will definitely change for VHF band emissions.
The difference b/w LO and non-LO will get changed, into what I can't say and don't know enough.
But that is why VHF radars detect LO aircraft earlier than X band, because the RCS of the LO on the X band is no longer the same on the VHF band.
Due to different reflective characteristics of the longer wavelength involved.
That is why the figures presented above, IMHO is very suspect and subjective and need to be viewed with suspicion and a pinch of salt.
But that is just my humble opinion and I could be wrong.
Take a look at following chart.
Notice the frequency and size of wavelengths at L-band and above? (Poor accuracy and imaging)
Now take a look at this:
https://www.aewa.org/Library/rf_bands.html
Applications:-
UHF-band (300-1,000 MHz) - Very long-range surveillance
VHF-band (50-330 MHz) - Very long-range surveillance
L-band (1-2 GHz) - Long-range surveillance, enroute traffic control
S-band (2-4 GHz) - Moderate-range surveillance, terminal traffic control, long-range weather
C-band (4-8 GHz) - Long-range tracking, airborne weather
X-band (8-12 GHz) - Short-range tracking, missile guidance, mapping, marine radar, airborne intercept
Ku-band (12-18 GHz) - High resolution mapping, satellite altimetry
K-band (18-27 GHz) - Little used (H 20 absorption)
Ka-band (27-40 GHz) - Very high resolution mapping, airport surveillance
mm-band (40-100+ GHz) - Experimental
Why do you think that fighter jets are equipped with radar systems operating in the X-band?
And finally:-
Now the problem with those detection ranges is that whether the target is cooperative or not.
F-22A Raptor with 'radar-reflectors' = cooperative target
F-22A Raptor without 'radar-reflectors' = non-cooperative target (deflecting and/or absorbing radar emissions)
US make sure that all of its VLO aircraft operate with 'radar-reflectors' while operating near countries deemed as hostile including Russia and China. Therefore, reported detection ranges are MISLEADING and not true reflections of the same in wartime conditions.
VLO = Very Low Observable
Here is a straightforward response:
https://www.businessinsider.de/f-35-russia-china-radar-counter-stealth-2017-5?r=US&IR=T
Today, Russia and China have built impressive arrays of very high frequency, or VHF, and other integrated radars that can spot even the US's most advanced and stealthy jets like the F-22 and the F-35 under the right circumstances.
While many have rushed to declare stealth a fruitless and expensive path for the US Air Force to walk, retired Marine Maj. Dan Flatley told Business Insider why pilots of America's most expensive weapons system weren't afraid of Russian or Chinese counterstealth.
"Adversaries have to build a kill chain," said Flatley, a former F-35 pilot. Just because a radar can find an object — and Russian VHF radars can spot F-35s — doesn't mean it can fix, track, target, and consummate that kill chain with a missile hit, he said.
"We're not trying to prevent every aspect of that chain, just snap one of those links," Flatley said.
So while an infrared search and tracking system could spot an F-35 and give enemy pilots an idea of where it is, it couldn't track it or target it with a missile. This means that the systems Russia and China have spent millions developing provide only a tiny glimpse of the F-35 — systems that may be sunk costs in the grand scheme of things.
"I don't need to stop everything all the time," Flatley said of the kill chain. "I just need to make you unable to finish what you've already invested tons of time and money and effort in trying to shoot me down."
None of them have modern Armed forces, AD systems , AF , and Abilities to coordinate a counter attack on America, and fighting a civil war or Terrorists Organization on their door steps . US is technological superior to any nation including Chinese which they themselves accept, but pitch Americans against well equipped modern Army like China and Russia , and we will get the idea which system in invincible and which is not .
Reason America turned into a Giant Super Power that American mainland is protect by huge sea and major world conflicts happen in Foreign Land, where US army was used as either Invaders , Mercenaries or allied/Coalitions forces . The world will know the real might of US, China and Russia when any two of them will fight against each other with their full potential ( OF COURSE NO NUKES ) .
Dost Pehle bataana tha na ese Green Card asaani se milta hai , Mai tu pata nai kyun IR-1/CR-1 family Visa ke chakker mai par gaya ..
Define "modern."
F-22A is 1990s era design.
B-2 Spirit which put other VLO platforms to shame even at present, is 1980s era design.
Syria is also importing modern stuff from Russia and China to enhance its defensive arrangements. The fact that even high-tech Chinese and Russian assets including YJ-27 class radar systems, Pantsir class, S-300 class and even S-400 class defenses have completely failed to live up to there hype in Syrian theater speak volumes. Do keep in mind that Russia provide its electronic warfare cover to Syrian regime to dissuade Israeli and/or American attacks on its assets but this measure is not making much difference either.
FYI:
https://www.thedrive.com/the-war-zo...ms-flying-into-the-ground-during-israeli-raid
The only Russian success story in terms of technology in Syrian theater is the T-90 MBT on the ground - credit where due.
US spend far more on its defenses than any country, therefore, disparity will be obvious in conventional clashes. US is now building defenses against ballistic missiles and hypersonics, and both Russia and China are understandably spooked. US have a massive military industrial complex in place since the 1950s to push boundaries in military as well as in consumer goods. Much of the technological advances in our hands today (networking gear; World Wide Web; Smartphones; computers; satellite navigation - are all byproducts of American advances in military-purpose technologies which eventually spilled over into consumer markets).
Both Russia and China keep US at bay with their arsenal of long-range strike platforms; both can directly threaten and subject American cities to strikes if the need arise. There is no form of parity otherwise.
